气候变化领域集成服务门户(CCPortal): Improved Internal Wave Spectral Continuum in a Regional Ocean Model

CCPortal

DOI	10.1029/2019JC015974
	Improved Internal Wave Spectral Continuum in a Regional Ocean Model
	Nelson A.D.; Arbic B.K.; Menemenlis D.; Peltier W.R.; Alford M.H.; Grisouard N.; Klymak J.M.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	Recent work demonstrates that high-resolution global models forced simultaneously by atmospheric fields and the astronomical tidal potential contain a partial internal (gravity) wave (IW) spectral continuum. Regional simulations of the MITgcm forced at the horizontal boundaries by a global run that carries a partial IW continuum spectrum are performed at the same grid spacing as the global run and at finer grid spacings in an attempt to fill out more of the IW spectral continuum. Decreasing only the horizontal grid spacing from 2 to 0.25 km greatly improves the frequency spectra and slightly improves the vertical wavenumber spectra of the horizontal velocity. Decreasing only the vertical grid spacing by a factor of 3 does not yield any significant improvements. Decreasing both horizontal and vertical grid spacings yields the greatest degree of improvement, filling the frequency spectrum out to 72 cpd. Our results suggest that improved IW spectra in regional models are possible if they are run at finer grid spacings and are forced at their lateral boundaries by remotely generated IWs. Additionally, consistency relations demonstrate that improvements in the spectra are indeed due to the existence of IWs at higher frequencies and vertical wavenumbers when remote IW forcing is included and model grid spacings decrease. By being able to simulate an IW spectral continuum to 0.25 km scales, these simulations demonstrate that one may be able to track the energy pathways of IWs from generation to dissipation and improve the understanding of processes such as IW-driven mixing. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	high-resolution modeling; internal wave spectra; internal waves; ocean; ocean models; regional modeling
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186879
作者单位	Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Physics, University of Toronto, Toronto, ON, Canada; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; School of Earth and Ocean Sciences and Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada
推荐引用方式 GB/T 7714	Nelson A.D.,Arbic B.K.,Menemenlis D.,et al. Improved Internal Wave Spectral Continuum in a Regional Ocean Model[J],2020,125(5).
APA	Nelson A.D..,Arbic B.K..,Menemenlis D..,Peltier W.R..,Alford M.H..,...&Klymak J.M..(2020).Improved Internal Wave Spectral Continuum in a Regional Ocean Model.Journal of Geophysical Research: Oceans,125(5).
MLA	Nelson A.D.,et al."Improved Internal Wave Spectral Continuum in a Regional Ocean Model".Journal of Geophysical Research: Oceans 125.5(2020).